It is very specific what items are able to be flight crew placarded and what aren't at DL. It breaks it down to what you can always placard, what you can placard at a non-mx station, and what you always have to have mechanic for.

It was similar but not as specific at Pinnacle.

So if a light or something burned out at an outstation, you had to call a wrench out? That's pretty inefficient. It all boils down to what is fed approved in your MEL. If you always have to have a wrench, don't let them push you. Know your responsibility and hold them to it.